theBard- Right that YouTube doesn't do frame packing that I'm aware. I use youTube set to SBS Half frame here which is compatible with my monitor. Once you subscribe to YouTube you can set your defaults to have it go to SBS and a higher resolution if available anytime you hit a video with 3D. It's nice that YT has an excellent user choice of different 3D formats.
The real problem still is that on YT the menu selection and main GUI for surfiong youTube is still 2D so once you put your TV in 3D SBS mode it is very difficult to surf the YT site.
There are two technical solutions to this. One is to use a checkerboard 3D format monitor, but unfortunately these are in very limited supply and are considered an obsolete technology. The second solution is with a properly implemented 3D auto sensing technology that will auto switch your monitor to 3D when the screen is in FULL 3D Mode, regardless of whether its SBS, TB, or Frame Packing. If not in full screen 3D mode then the monitor remains in 2D. This technology is from a company called "Sensio" Sony is also working on it's own version of the technology. Once this technology is implemented, you'll be able to surf the YT channels and videos in 2D for selection and when you wish to play, select full screen and it will auto switch to SBS 3D.
One more thing you need to realize is that YT is mostly user quality controlled 3D and as such much of what I see up there is very poor 3D quality. I'm not talking about content, but rather technical quality of the 3D form. I've seen the range of issues from claiming 3D but it is only 2D to 3D left right images that are so far out of sync it's a complete mess.
My channel offers quite a few video programs in 3D, a few in 2D too, that I take pride in controlling the quality of the 3D to the best of my state of the art. If a problem is pointed out to be I try to correct it or pull the video down. I don't want to show 3D as a silly gimmick or give the impression that 3D sucks because of the quality of program I put up. My programs are not high end but rather home videos. Most are edited but when not edited and direct camera shoots, I state that in the description.http://www.youtube.com/user/DonLandis